My new Dell Inspiron AIO 27" 7710 acted quirkily almost from day one. This is my 3rd or 4th Dell, but I'm not sure I'd buy one again. It seems that at least 5 techs over about 7-8 days over 2 months and many (too many) hours remoting in finally determined that it needs a new motherboard. I spent hours over a number of days in early November with Dell techs remoting into my machine and running the same tests over and over as I got a new tech each day... They obviously didn't look at the case file to see what had already been done. I left off until the holidays were over when I started picking away at the variety of issues (couldn't add a 4th account in Mail, sound went out for hours in both the internal and external speakers, purchased software wasn't in the Dell Digital Locker, shut down didn't work, etc, etc, etc.). Finally, after 4 days I reset it back to factory defaults and wiped everything out. That didn't work, so I reached out to Dell again. Yesterday a tech remoted in for about 4 hours, ran through some more technical tests/diagnostics and then asked me to do wipe/restore it all over again. Which I did but that didn't work (again). Today a tech remoted in again for another 5 hours and after a series of increasingly technical diagnotics including 1) reboot, F2, then read BIOS info; and 2. shutdown, hold Function and power buttons and then read error codes. Now they plan to replace the motherboard. I guess that's a good thing. All in all the techs were polite, but except for one today, never seemed to be aware of what was in the cases file, ie, what had already been tried. The only reason it's not a 1 rating is that the techs were uniformly polite and willing to keep at it as long as I would.